// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef UI_WM_CORE_EASY_RESIZE_WINDOW_TARGETER_H_
#define UI_WM_CORE_EASY_RESIZE_WINDOW_TARGETER_H_

#include "base/macros.h"
#include "ui/aura/window_targeter.h"
#include "ui/gfx/geometry/insets.h"
#include "ui/wm/wm_export.h"

namespace wm {

// An EventTargeter for a container window that uses a slightly larger
// hit-target region for easier resize.
class WM_EXPORT EasyResizeWindowTargeter : public aura::WindowTargeter {
public:
    // |container| window is the owner of this targeter.
    EasyResizeWindowTargeter(aura::Window* container,
        const gfx::Insets& mouse_extend,
        const gfx::Insets& touch_extend);

    ~EasyResizeWindowTargeter() override;

protected:
    void set_mouse_extend(const gfx::Insets& mouse_extend)
    {
        mouse_extend_ = mouse_extend;
    }

    void set_touch_extend(const gfx::Insets& touch_extend)
    {
        touch_extend_ = touch_extend;
    }

    // aura::WindowTargeter:
    bool EventLocationInsideBounds(aura::Window* window,
        const ui::LocatedEvent& event) const override;

private:
    // Returns true if the hit testing (EventLocationInsideBounds()) should use
    // the extended bounds.
    bool ShouldUseExtendedBounds(const aura::Window* window) const;

    aura::Window* container_;
    gfx::Insets mouse_extend_;
    gfx::Insets touch_extend_;

    DISALLOW_COPY_AND_ASSIGN(EasyResizeWindowTargeter);
};

} // namespace wm

#endif // UI_WM_CORE_EASY_RESIZE_WINDOW_TARGETER_H_
